2HS E. E. AUSTEN TABANlDiE COLLECTED IN 



Dorcaloemus candidolimbatus, sp. n. 



S ? . — Length, (^ (1 specimen) 15'4 mm., ? (3 specimens) 13 to 15 mm. ; 

 width o£ head, (^ 4*8 mm., ? 4*4 to 4*8 mm. ; width of front of $ at vertex 

 0'6 to 0*75 mm. ; distance from upper margin of occiput to anterior 

 extremity of face, in (^ 3"75 mm,, in ? 3*3 to 3*75 mm. ; length of proboscis,. 

 (^ 10 mm., ? 8-25 to 8*75 mm. ; length of wing, <^ 12*5 mm., ? 12 to 

 12'6 mm. ; greatest width of wing, (^ 4-6 mm., ? 4*4 to 4*6 mm. 



Head and thorax (at least in $ ) as in foregoing sj^ecies ; dorsum of abdomen 

 black, posterior angles of first segment ochraceous, sides of second segment more 

 or less chestnut or taivnij, hind borders of second, third and fourth segments 

 clothed ivitJi shining silvery-iohite hair, hind borders of fifth and sixth segments 

 in $ clothed more narrowly with shining orange-ochraceous (golden-ijelloiv) 

 hair, on sixth segment sometimes interrupted by black hairs iyi middle liae,. 

 ground-colour of hind borders of all segments from first to sixth inclusive 

 sometimes ochraceous-buff in ? ; ivings and legs as in foregoing species, front 

 tibice in ? sometimes brown at distal extremity and, except at extreme base,. 

 entirely brown or brownish on hiside. 



Head : palpi and proboscis as in foregoing species ; first and second joints 

 of antenna' clove-brown, greyish pollinose, second joint sometimes rufescent,. 

 third joint wanting in all specimens available for examination. Thorax : 

 hind margin of scutellum clothed with dark brown or black hair, ochre- 

 yellow hair on dorsum mixed with brownish hair. Abdomen : dorsum 

 clothed for most part with black hair ; first segment sometimes with a 

 greyish border surrounding black central area, posterior angles and hind 

 border of this segment clothed with ochre-yellow hair ; chestnut or tawny 

 area on sides of second segment very conspicuous in some $ ? , but in types 

 of cT and ? so much reduced as to be scarcely visible, actual lateral margins 

 in the ^ being clove-brown or black ; venter similar to dorsum, second 

 segment in $ more or less ochraceous-rufous. Squamce and halteres as in 

 foregoing species. 



Katanga, S.E.Congo Free State: Mid-Lualaba Valley, 3000 ft., 18-20. 

 iv.l907 [S. A. Neave). 



As indicated above at the end of the description of the foregoing species,. 

 Dorcaloemus candidolimbatus is closely allied to D. auricomus, from which 

 it differs in the ? in the golden-yellow hair on the distal portion of the 

 dorsum of the abdomen being confined to the hind margins of the fifth and 

 sixth segments, and in the shining hair on the hind margins of the second, 

 third, and fourth abdominal segments being silvery-white instead of golden- 

 yellow. 



